1977 Byron Nelson Signed First Day Issue Augusta National Envelope Golf JSA1977 Byron Nelson Signed Augusta National official First Day Issue, authenticated by JSA Official Augusta National First Day Issue enveloped, postmarked and stamped Byron Nelson Jr. was an American professional golfer between 1935 and 1946, widely considered one of the greatest golfers of all time Bobby Jones pictured on front of envelope Dimensions: 6. 5" x 3. 75" Letter of Authenticity from JSA included Excellent condition; minimal edgewear and